Amplitude
Frequency
Quality
Velocity
Answer is Wrong!
Answer is Right!
The correct answer is B. Frequency.
The frequency of light is the number of waves that pass a given point in a given amount of time. The higher the frequency, the shorter the wavelength and the bluer the light. The lower the frequency, the longer the wavelength and the redder the light.
Amplitude is the height of a wave. It does not affect the color of light.
Quality is a subjective term that refers to the purity of a sound or light. It does not affect the color of light.
Velocity is the speed of light. It does not affect the color of light.